XML 46 R33.htm IDEA: XBRL DOCUMENT
v3.21.1

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands | 9 Months Ended
--- | ---
Mar. 31, 2021 USD ($)
Goodwill [Line Items] |
Goodwill | $ 60,369
Goodwill [Roll Forward] |
Net balance at June 30, 2020 | 60,369
Translation adjustment | 236
Net balance at March 31, 2021 | 60,605
Utility and Power Infrastructure [Member] |
Goodwill [Line Items] |
Goodwill | 6,975
Goodwill [Roll Forward] |
Net balance at June 30, 2020 | 6,905
Translation adjustment | 70
Net balance at March 31, 2021 | 6,975
Process and Industrial Facilities |
Goodwill [Line Items] |
Goodwill | 26,873
Goodwill [Roll Forward] |
Net balance at June 30, 2020 | 26,846
Translation adjustment | 27
Net balance at March 31, 2021 | 26,873
Storage and Terminal Solutions |
Goodwill [Line Items] |
Goodwill | 26,757
Goodwill [Roll Forward] |
Net balance at June 30, 2020 | 26,618
Translation adjustment | 139
Net balance at March 31, 2021 | $ 26,757

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_UtilityAndPowerInfrastructureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_ProcessAndIndustrialFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_StorageAndTerminalSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |